Jakob Thornton, 22, has been jailed for at least two years. Picture: Jeremy PiperSource:News Corp Australia

A 23-year-old driver who was looking at his mobile phone before he crashed into two police officers setting up a random breath test site in southwest Sydney has been jailed for at least two years.

Jakob Thornton pleaded guilty to dangerous driving causing grievous bodily harm over the 2018 crash at Leumeah which left the two officers with serious injuries.

Judge John Hatzistergos on Friday sentenced Thornton to three years and eight months in jail with a non-parole period of two years at Sydney’s Downing Centre District Court.

Jakob Thornton has been jailed for at least two years. Picture: Instagram @jakob_t_ismeSource:Instagram

Jakob Thornton rammed into two police officers as they set up an RBT. Picture: Instagram @jakob_t_ismeSource:Instagram

The serial traffic offender rammed into the two police officers who were setting up a random breath testing station at Leumeah, in southwest Sydney, on the evening of February 16, 2018.

The collision broke Senior Constable Matthew Foley’s leg and critically damaged the right leg of Senior Constable Jonathan “Jono” Wright, leaving him so badly injured the father-of-three had to have 15cm of it amputated below his knee.

During a trial, the court heard Thornton exchanged 29 text messages with his girlfriend while driving on the Hume Highway in Sydney’s southwest before causing a catastrophic crash which resulted in a police officer having his leg amputated.

Text messages exchanged between the pair before the terrible crash and seen by news.com.au show Thornton joking, them telling each other “I love you” and exchanging love hearts.

They talk about shopping, spending the night together, exchanging “snuggles” and call each other “bubby” and “master”.

Jakob Thornton, 22, walks out of Bankstown Police Station where he has to report for bail conditions with his girlfriend. Picture: Jeremy PiperSource:News Corp Australia

Senior Constable Wright outlined the drastic downturn in his life since having his leg amputated.

In a statement he said he had gone from “a very active person” who loved hiking to a person who found physical activity, on his prosthesis, “difficult and gruelling”.

Senior Constable Wright suffered chronic pain, falls, phantom limb syndrome, mood variation, terrible fatigue and difficulty sleeping. He is also on a large amount of medication, including numerous painkillers including endone and OxyContin taken multiple times daily.

Two letters of apology by Thornton, one written while he was allegedly suffering PTSD in custody, and an apology written by his mother Katja that was sent to the two officers were tendered to the court.

In one letter, which was tendered to the court, Thornton offered his “deepest apologies” for a “stupid mistake”.